Expansion valve



FIG. 1 is a front perspective view of an expansion valve showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof, a left side view being symmetrical to the right side view;

FIG. 6 is a plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a cross-sectional view of line 8-8 in FIG. 3.

The broken line showing of unclaimed portions of the expansion valve forms no part of the claimed design. 

The ornamental design for an expansion valve, as shown and described. 